Mnemonic Betrayal [Guilds of Ravnica] Planechase Set: Avacyn Restored Type: Enchantment

Set: Avacyn Restored Type: Enchantment Rarity: Rare Cost: {1}{G}{G} Whenever a creature you control attacks

Set: Ravnica: City of Guilds Type: Artifact Rarity: Rare Cost: {3} Whenever a nonartifact permanent enters the battlefield under your control

Set: Gateway 2007 Type: Creature — Elf Druid Rarity: Rare Cost: {G} {T}: Add {G}

Target creature defending player controls can block any number of creatures this turn

Mnemonic Betrayal [Guilds of Ravnica] Planechase Set: Avacyn Restored Type: EnchantmentSet: Guilds of Ravnica Type: Sorcery Rarity: Mythic Cost: {1}{U}{B} Exile all opponents' graveyards. You may cast spells from among those cards this turn, and you may spend mana as though it were mana of any type to cast those spells. At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards. Exile Mnemonic Betrayal.